I love this game as it gets more complex, but after a certain point it’s really tough to change track paths because so many passengers are lining up. Can there be a passenger ‘bomb’ feature that deletes all current passengers so I can rebuild the whole setup? Maybe after week 9 or 10?

While it would be useful I think it defeats the point of the game. When designing your system you need to make sure it can handle sudden spikes. If you want to completely rebuild don’t be afraid to pause the game delete everything and go from there